(57) A sensor valve (44) for indicating a status of operation of a hydraulic system (4)
ar-ranged on an implement (3) connected to a hydraulic unit (1) and a control system
(2) is described, in which a valve housing (441) accommodates a sensor-signal-inducing
slide (442) which is displaceable between an inactive, first position (1) and an active,
second position (II), an associated sensor (445) generating, in the first posi-tion
(I) of the slide, a signal different from a signal which is generated when the slide
(442) has been moved to its second position (II), and in which a drain channel (4414)
forms a fluid-communicating connection between first and second valve ports (4411,
4412).
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